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Triple Digit Heat for Sunday

An area of high pressure will keep the offshore winds in place for the next 72 hours. With dry northerly winds, our fire danger will remain very high across the district. Along with triple digit heat for our inland valleys, coastal locations will warm into the 70s and 80s. (Published Saturday, Sept. 7, 2013)

Last weekend may have been the traditional last weekend of summer, but this coming weekend has plenty of summer-like features.

For one thing, it's going to be hot. Triple digits are in the forecast for the South Bay and the Livermore Valley. San Francisco is going to be in the 80s, and that is a bona fide heatwave for the City.

The cities of Livermore, Gilroy and Santa Rosa are also expected to hit 100 degrees Saturday with even hotter temps forecast for Sunday.

This is also the first weekend since the new span of the Bay Bridge opened and Caltrans is predicting heavy traffic.

Extreme Weekend Heat In Jeff's 7 Day

A large dome of hot air will continue to slide over the Greater Bay Area. However, this will be different than most heat events as offshore winds help amplify temperatures even at the Coast. Chief Meteorologist Jeff Ranieri tracks how long 100s last in your 7 day forecast.

(Published Friday, Sept. 6, 2013)

There are also lots of reason to be outdoors:

The Giants host the Diamondbacks AT&T.

The A's host the Astros at O.Co.

The 49ers will hold their season opener at Candlestick Sunday afternoon against the Green Bay Packers.

The Cal Golden Bears host the Portland State Vikings at Memorial Stadium in Berkeley.

America's Cup racing finally begins.

All of the above will bring tens of thousands of people to San Francisco, Oakland and Berkeley.

America's Cup: U.S.A. vs. New Zealand

The 49ers alerted fans to possible traffic delays.

"The matchup is part of a busy weekend in Bay Area sports and major events such as the San Francisco Giants game at 1:05 p.m. and the America’s Cup Finals races taking place beginning at 1:00 p.m. Therefore, severe traffic delays are anticipated throughout the surrounding areas. The 49ers urge fans to plan accordingly," the team said.

In San Francisco, an event that has been years in the making finally begins on the San Francisco Bay.

Bay Bridge Opening Ceremony

Oracle Team USA and Emirates Team New Zealand will sail in the first race of the America's Cup Finals at 1:15 p.m. Saturday.

Because Oracle won the previous America's Cup in 2010, team owner Larry Ellison got to decide where the next competition would be held and he chose San Francisco.

The regatta has been criticized for being smaller than race officials predicted, with only three teams challenging Oracle for the Cup. The downsizing of the America's Cup has also led to sparse crowds and noncompetitive preliminary races, while race organizers have also failed to raise enough money to recoup San Francisco for the city's costs related to the regatta. Mayor Ed Lee says because of the lack of private donors, the city's general fund is currently on the hook for about $7 million in expected costs for the races.

That all could change this weekend when thousands flock to the shores of San Francisco to see the 72 foot boats race.